803 Answered Questions for the topic Probability & Statistics
Probability & Statistics
04/17/17
please help! probability
The students at Southern Junior High School are divided into four homerooms. Benjamin just moved into the school district and will be randomly assigned to one homeroom. Which methods can be used to...
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Probability & Statistics
04/17/17
please help! probability
A restaurant owner has found that 80% of her customers return to the restaurant within two weeks. She wants to create a tool that will simulate the habits of her customers and allow her to predict...
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Probability & Statistics
04/17/17
please help! probability
April and Sanjay are both using tools to simulate the probability that a family with three children will have exactly one girl. April is using a coin, with tails up representing a boy and heads up...
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Probability & Statistics
04/17/17
please help! probability
Vince makes 75% of his free throw attempts. He wants to create a tool that will simulate his free throw shooting and allow him to predict the probability that he will make 6 of his next 7 free...
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Probability & Statistics
04/16/17
A machine produces widgets at a defective rate of 9%. A sample of 8 widgets is taken, What is the probability that 3 of them are defective?
A machine produces widgets at a defective rate of 9%. A sample of 8 widgets is taken, What is the probability that 3 of them are defective?
Explanations would be most helpful!
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04/12/17
What is the probability of choosing 2 white balls and 3 red balls?
a barrel contains 7 yellow balls, 3 green balls, 11 white balls, 5 red balls and 4 orange balls. What is the probability of choosing 2 white balls and 3 red balls?
04/12/17
Coin probability
A loaded coin, with P(H)= 3/5 and P(T)=2/5 on each single toss, is tossed 6 times. Let E be the event that exactly 3 heads appeared in 6 tosses and F be the event that at least 2 heads appeared in...
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04/12/17
Probability
In a family of 7 children, let E be the event that the family has at least 3 girls and F be the event that the second born child is a girl. Find the following probabilities:
A) P(E)=
B) P(F)=
C)...
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Probability & Statistics
04/11/17
what is the odds of missing a free throw 7 times in a row with the free throw shooter being 99%?
free throw shooter is 99% and he shoots 7 times. what is the odd of missing all 7 shots?
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04/08/17
how to find standard error using only x=47, n=95, and the confidence level is 99.9%
I am just confused on how to find the standard error without having a standard deviation
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Probability & Statistics Math
04/07/17
A box contains only the letters A,B,C,D and E. Here are the probabilities for A-D: P(a)=1/7 P(b)=1/8 P(c)=1/6 and P(d)=1/10. P(e) is unknown.
A box contains only the letters A,B,C,D and E. Here are the probabilities for A-D: P(a)=1/7 P(b)=1/8 P(c)=1/6 and P(d)=1/10. P(e) is unknown. What is P(e)?
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04/06/17
Running out of time! Please help
The hypothenuse, X, of an isosceles right triangle is a uniform random variable on 0, 1]. Calculate the expected value and the variance of the area of the triangle.
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Probability & Statistics
04/06/17
To create an entry code, you must first choose 2 letters and then, 4 single-digit numbers. How many different entry codes can you create?
Its from chapter 11 probabilty and statistics, the question is from the first chapter 11-1 permutations and combinations
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Probability & Statistics Probability
04/01/17
A bag contains 14 blue balls and 6 red balls. If 2 balls are drawn at random from the bag, with the first ball being replaced before the second ball is drawn, w
(a) the first ball is red and the second is blue (b) one ball is red and the other is blue
Probability & Statistics
04/01/17
An urn contains 6 red, 7 white, and 8 black balls. One ball is drawn from the urn, it is not replaced, and a second ball is drawn.
(b) What is the probability that one ball is white and one is red? (c) What is the probability that at least one ball is black?
04/01/17
A bag contains 5 white balls and 9 red balls. Three balls are drawn, without replacement, from the bag.
(a) What is the probability that all three balls are white? (b) What is the probability that exactly one ball is white? (c) What is the probability that at least one ball is white?
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03/31/17
Find the probability that when you select two cars, first you pick a 3 then you pick a jack (without replacement)
A probability problem
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Probability & Statistics
03/31/17
Probability
Hey everyone. If i had 4 boys and 8 girls. And i need to create 4 teams. Each team will be containing 2 girls and 1 boy.What will be the number of variations of Team?And what's the formula used?And...
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Probability & Statistics
03/23/17
Gil rolls a number cube 78 times. How many times can he be expected to roll a number greater than 1?
It is 7th grade math.
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Probability & Statistics Probability Problems
03/23/17
Methods of Mathematical Statistics
A bag contains 5 coins, one of which has a head on both sides while the other 4 coins are normal. A coin is chosen at random from the bag and tossed 2 times. The number of heads obtained is a...
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Probability & Statistics
03/21/17
Find the probability that among six randomly selected people exactly four of them have brown eyes
Find the probability that among six randomly selected people exactly four of them have brown eyes
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03/21/17
There are 5 problems in a quiz, what is the probability that a student randomly guesses and gets at least 3 problems correct ? B) what is the mean of correct an
I don't understand how to solve this problem and I want to fully understand it for my upcoming test
03/16/17
Probability
A bag contains 28 blue marbles and 12 red marbles. If Milton removes two marbles without replacing them, what is the probability that the first marble will be blue and the second one will be red?
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03/15/17
find the probability
A gardener has 9 tulip, 7 daffodil and 5 crocus bulbs to plant. If he selects 3 bulbs at random to sow what is the probability he sows:i. 2 tulips and a daffodil? ii. 3 of the same flower? iii. At...
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03/12/17
Probability
We choose 10 random cards from a normal deck of cards(52 cards). What is the probability that we get:a. 0 acesb. maximum 3 acesc. at least 1 ace and at least one face card
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